package com.happymmall.controller.user;

import com.alibaba.fastjson.JSONObject;
import com.happymmall.entity.User;
import com.happymmall.service.UserService;
import com.happymmall.service.impl.UserServiceImpl;
import com.happymmall.util.JwtUtils;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.HashMap;
import java.util.Map;

@WebServlet("/user/get_user_info.do")
public class GetUserInfoServlet extends HttpServlet {
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        resp.setContentType("application/json;charset=utf-8");

        //获取session
        // HttpSession session = req.getSession();
        // Integer id = (Integer) session.getAttribute(Constants.USER_SESSION);

        //获取TOKEN
        String token = req.getHeader("Authorization");
        // 提取用户ID
        Integer userId = JwtUtils.extractClaim(token, claims -> claims.get("userId", Integer.class));//Lambda

        //调用业务
        UserService userService = new UserServiceImpl();
        User user = userService.get_user_info(userId);

        //返回结果
        if (user != null) {

            Map<String, Object> resultData = new HashMap();
            resultData.put("status", 0);
            resultData.put("data", user);

            JSONObject jsonObject = new JSONObject();
            String info = jsonObject.toJSONString(resultData);
            PrintWriter out = resp.getWriter();
            out.write(info);
        } else {
            Map<String, Object> resultData = new HashMap();
            resultData.put("status", 1);
            resultData.put("msg", "用户未登录，无法获取当前用户信息");

            JSONObject jsonObject = new JSONObject();
            String info = jsonObject.toJSONString(resultData);
            PrintWriter out = resp.getWriter();
            out.write(info);
        }
    }


}
